CN112394069A - Display panel abnormality detection method and device - Google Patents
Display panel abnormality detection method and device Download PDFInfo
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- CN112394069A CN112394069A CN202011415490.3A CN202011415490A CN112394069A CN 112394069 A CN112394069 A CN 112394069A CN 202011415490 A CN202011415490 A CN 202011415490A CN 112394069 A CN112394069 A CN 112394069A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The embodiment of the application discloses a method and a device for detecting the abnormity of a display panel, wherein the device comprises the following steps: the machine table is used for bearing the display panel; the light source is used for irradiating light to the display surface of the display panel when the display panel is in a dark state; the image acquisition equipment is used for acquiring a detection picture of the display panel when the display surface of the display panel irradiates light; the abnormity detection module is used for determining that the display panel has abnormity when the detection picture has the set area; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area. The method and the device for detecting the abnormity of the display panel can reduce the production cost.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a method and an apparatus for detecting an abnormality of a display panel.
Background
In the manufacturing process of the display panel, after the display panel is cut into small sizes, a lighting test is performed to confirm the grade of the panel.
However, in each lighting process, only defects (abnormalities) in the display area can be detected, and the non-display area of the panel cannot be detected, and since the display panel is subjected to actions such as clamping, conveying, positioning, contacting (Contact) and the like in a plurality of process steps during the process of transporting and lighting, edge chipping or cracking of the display panel is easily caused, but the conventional detection device cannot detect the abnormalities, so that effective blocking cannot be performed in the lighting stage, and thus, the display panel is abnormal in batch, and further, the production cost is increased.
Disclosure of Invention
The embodiment of the application provides an abnormity detection method and device of a display panel, which can reduce production cost.
The embodiment of the application provides an anomaly detection device of a display panel, the device includes:
the machine table is used for bearing the display panel;
the light source is used for irradiating light to the display surface of the display panel when the display panel is in a dark state;
the image acquisition equipment is used for acquiring a detection picture of the display panel when the display surface of the display panel irradiates light;
the abnormity detection module is used for determining that the display panel has abnormity when the detection picture has the set area; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area.
The embodiment of the application provides an abnormality detection method for a display panel, which comprises the following steps:
placing a display panel on a machine table;
when the display panel is in a dark state, irradiating light to the display surface of the display panel;
when the display surface of the display panel is irradiated with light, acquiring a detection picture of the display panel;
when the detection picture is detected to have the set area, determining that the display panel has abnormity; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area.
The anomaly detection method and device for the display panel comprise a machine, wherein the machine is used for bearing the display panel; the light source is used for irradiating light to the display surface of the display panel when the display panel is in a dark state; the image acquisition equipment is used for acquiring a detection picture of the display panel when the display surface of the display panel irradiates light; the abnormity detection module is used for determining that the display panel has abnormity when the detection picture has the set area; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area; when the non-display area has cracks, fragments and the like, the damage position can generate a lightening phenomenon under the irradiation of light, and the lightening area is compared with the gray-scale value of the rest area, so that whether the display panel has abnormity or not is determined.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a top view of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of an abnormality detection apparatus for a display panel according to an embodiment of the present application.
Fig. 3 is a top view of a detection frame according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an abnormality detection apparatus for a display panel according to another embodiment of the present application.
Fig. 5 is a schematic structural diagram of an abnormality detection apparatus for a display panel according to yet another embodiment of the present application.
Fig. 6 is a flowchart illustrating an abnormality detection method for a display panel according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
As shown in fig. 1, the display panel 10 includes a display area 11 and a non-display area 12, the display area 11 being for displaying a screen; the non-display area 12 is provided with a plurality of signal access points 13, and in the lighting stage, the signal access points 13 are accessed with signals to light the display panel 10.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an abnormality detection apparatus for a display panel according to an embodiment of the present application.
As shown in fig. 2, the abnormality detection device of the display panel of the present embodiment includes: the apparatus includes a stage 20, a light source 30, an image capturing device 40, and an abnormality detecting module 50.
The machine 20 is used for carrying the display panel 10. The stage 20 may be a stage of a lighting apparatus.
The light source 30 is configured to irradiate light to the display surface of the display panel 10 when the display panel 10 is in a dark state; in one embodiment, in order to improve the detection accuracy, the light source 30 is disposed above the display surface of the display panel 10, and the light source 30 is located at the side of the display panel 10, so as to avoid blocking the image capturing device when the light source is disposed at the side of the display panel. In one embodiment, to improve the detection accuracy, the light source 30 is used to provide parallel light collection, so as to avoid generating reflected light, which interferes with the detection result. In one embodiment, the light source 30 is disposed obliquely with respect to the display surface of the display panel 10 in order to allow the entire display panel to be irradiated with light. In a preferred embodiment, light sources 30 are disposed around the display panel. In order to further improve the detection accuracy, the intensity of the light provided by the light source 30 may be greater than a predetermined intensity, that is, the light source provides stronger light.
The image capturing device 40 is configured to acquire a detection picture of the display panel 10 when the display surface of the display panel 10 is irradiated with light. In one embodiment, image capture device 40 may be a camera.
With reference to fig. 3, the anomaly detection module 50 is configured to determine that the display panel 10 is anomalous when the detection screen 60 detects that the setting area 61 exists; wherein the detection screen 60 further includes a non-setting area 62; the gray scale value of the setting region 61 is greater than that of the non-setting region 62. It is understood that, when it is detected that the setting region 61 is not present in the detection screen 60, it is determined that there is no abnormality in the display panel 10.
For example, when there are cracks, fragments, and the like in the non-display area, the cracks and fragments areas reflect light under the irradiation of light, and thus a white area (i.e., a bright area) appears in the detection screen, and a difference occurs between the gray scale value of the panel in a dark state (black).
In an embodiment, to facilitate repairing the display panel, the abnormality detecting module 50 is further configured to determine an abnormality type of the display panel 10 according to the characteristic parameters of the setting area 61. In an embodiment, to further improve the efficiency of detection and the accuracy of detection, the characteristic parameter includes at least one of an area, a length, a width, and a shape. Of course, it is understood that the type of the characteristic parameter is not limited thereto, and may be specifically set according to the requirement. In an embodiment, when the characteristic parameter of the setting region satisfies a first preset condition, determining that the abnormal type of the display panel is a first preset type; when the characteristic parameters of the set area meet a second preset condition, determining that the abnormal type of the display panel is a second preset type; and when the characteristic parameters of the set area meet a third preset condition, determining that the abnormal type of the display panel is a third preset type. In an embodiment, in order to improve the detection efficiency, when the area of the setting region is smaller than a preset area, the abnormality type of the display panel is determined to be a third preset type. Since the particles in the display panel also generate the reflection phenomenon, when the area of the set region is small, it can be determined that the abnormal type of the display panel is the particles.
And when the area of the set area is larger than a preset area, determining that the abnormal type of the display panel is a first preset type or a second preset type. For example, taking the characteristic parameters as length, width and area as examples, when the area of a set region is large, the length of the set region is greater than a preset length, and the width of the set region is greater than a preset width, determining that the abnormal type of the display panel is a fragment; and when the length of the set area is greater than the preset length and the width of the set area is less than the preset width, determining that the abnormal type of the display panel is a crack. The first preset type, the second preset type and the third preset type are different, and the first preset type, the second preset type and the third preset type are respectively one of breakage, crack and fragment.
Because the shape and size of the breakage, the crack and the fragment are different, the abnormal type can be distinguished according to the shape, the crack is in the shape of an irregular line and is relatively dispersed, the shapes of the breakage and the fragment are relatively concentrated, the area of the fragment is larger, and the area of the breakage is smaller (for example, less than 3000 um). The areas of light reflected by the breakage, crack and fragment far exceed the areas of light reflected by the particles.
In one embodiment, as shown in fig. 4, the apparatus 100 further includes a signal input module 70, and the signal input module 70 is configured to input a signal to the signal access point 13 to illuminate the display area, so as to facilitate detection of the display area.
In one embodiment, as shown in fig. 5, the detection apparatus 100 may further include: and the prompt module 80 is configured to send a prompt signal when it is determined that the display panel 10 is abnormal. For example, when it is determined that there is an abnormality in the display panel, an alarm is issued to facilitate processing of the display panel.
In other embodiments, the detection apparatus 100 may further include: a transport device (not shown in the figures) for moving the display panel.
When the non-display area has cracks, fragments and the like, the damage position can generate a lightening phenomenon under the irradiation of light, and the lightening area is compared with the gray-scale value of the rest area, so that whether the display panel has abnormity or not is determined.
As shown in fig. 6, an embodiment of the present application further provides an abnormality detection method for a display panel, including:
s101, placing a display panel on a machine table;
for example, the display panel 10 may be transferred to the machine 20 by a transfer device (not shown).
S102, when the display panel is in a dark state, irradiating light to the display surface of the display panel;
for example, in one embodiment, when the display panel is not lit, that is, when the entire display surface of the display panel is black, the light source 30 irradiates light to the display surface of the display panel 10.
S103, when the display surface of the display panel irradiates light, acquiring a detection picture of the display panel;
for example, when the display surface of the display panel is irradiated with light, a detection screen of the display panel is acquired by the image pickup device 40.
S104, when the detection picture is detected to have the set area, determining that the display panel has abnormity; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area.
For example, referring to fig. 3, when the abnormality detection module 50 detects that the setting area 61 exists in the detection screen 60, it determines that the display panel 10 has an abnormality; wherein the detection screen 60 further includes a non-setting area 62; the gray scale value of the setting region 61 is greater than that of the non-setting region 62.
In another embodiment, the method further comprises:
and S105, determining the abnormal type of the display panel according to the characteristic parameters of the set area.
Wherein the characteristic parameter includes at least one of an area, a length, a width, and a shape.
S1051, when the characteristic parameter of the set area meets a first preset condition, determining that the abnormal type of the display panel is a first preset type;
s1052, when the characteristic parameters of the setting area meet a second preset condition, determining that the abnormal type of the display panel is a second preset type;
s1053, when the characteristic parameter of the setting area meets a third preset condition, determining that the abnormal type of the display panel is a third preset type.
In another embodiment, the method further comprises:
and S106, when the display panel is determined to be abnormal, sending out a prompt signal.
In a specific implementation process, a lighting test may be performed on the display panel, that is, the display area is lit, then the image of the display area at this time is acquired by the image acquisition device, and after the image is processed, whether the display area is abnormal or not is determined, and the display area is usually mainly detected as abnormal particles. After the display area is detected, step S102 to step S104 are performed. Of course, the order of the lighting test is not limited thereto.
The method for detecting the abnormality of the display panel of the embodiment includes all technical solutions of the above-mentioned detection device, so that all technical effects can be achieved, and details are not described here.
The anomaly detection method and device for the display panel comprise a machine, wherein the machine is used for bearing the display panel; the light source is used for irradiating light to the display surface of the display panel when the display panel is in a dark state; the image acquisition equipment is used for acquiring a detection picture of the display panel when the display surface of the display panel irradiates light; the abnormity detection module is used for determining that the display panel has abnormity when the detection picture has the set area; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area; when the non-display area has cracks, fragments and the like, the damage position can generate a lightening phenomenon under the irradiation of light, and the lightening area is compared with the gray-scale value of the rest area, so that whether the display panel has abnormity or not is determined.
The foregoing describes in detail a method and an apparatus for detecting an abnormality of a display panel according to an embodiment of the present application, and a specific example is applied to illustrate a principle and an embodiment of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. An abnormality detection apparatus for a display panel, characterized in that the apparatus comprises:
the machine table is used for bearing the display panel;
the light source is used for irradiating light to the display surface of the display panel when the display panel is in a dark state;
the image acquisition equipment is used for acquiring a detection picture of the display panel when the display surface of the display panel irradiates light;
the abnormity detection module is used for determining that the display panel has abnormity when the detection picture has the set area; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area.
2. The abnormality detection device of a display panel according to claim 1,
and the abnormality detection module is also used for determining the abnormality type of the display panel according to the characteristic parameters of the set area.
3. The abnormality detection device of a display panel according to claim 2,
the characteristic parameter includes at least one of an area, a length, a width, and a shape.
4. The abnormality detection device of a display panel according to claim 3,
when the characteristic parameters of the set area meet a first preset condition, determining that the abnormal type of the display panel is a first preset type;
when the characteristic parameters of the set area meet a second preset condition, determining that the abnormal type of the display panel is a second preset type;
and when the characteristic parameters of the set area meet a third preset condition, determining that the abnormal type of the display panel is a third preset type.
5. The abnormality detection device according to claim 1, wherein said light source is disposed above a display surface of said display panel, and said light source is located on a side surface of said display panel.
6. The apparatus of claim 1, wherein the light source is configured to provide parallel collected light.
7. The abnormality detection device according to claim 6, characterized in that the light source is disposed obliquely with respect to a display surface of the display panel.
8. The abnormality detection device according to claim 1, characterized in that the display panel further comprises a display area and a non-display area, the non-display area being provided with a signal access point;
the apparatus also includes a signal input module for inputting a signal to the signal access point.
9. The abnormality detection device according to claim 1, characterized in that the detection device further comprises:
and the prompt module is used for sending out a prompt signal when the display panel is determined to be abnormal.
10. An abnormality detection method for a display panel, comprising:
placing a display panel on a machine table;
when the display panel is in a dark state, irradiating light to the display surface of the display panel;
when the display surface of the display panel is irradiated with light, acquiring a detection picture of the display panel;
when the detection picture is detected to have the set area, determining that the display panel has abnormity; the detection picture also comprises a non-setting area; the gray scale value of the set area is larger than that of the non-set area.
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| CN113870779A (en) * | 2021-09-14 | 2021-12-31 | 安徽亿普拉斯科技有限公司 | Method for adjusting uneven OLED display |
| CN116504163A (en) * | 2023-06-30 | 2023-07-28 | 深圳市木兰轩科技有限公司 | LED display screen operation monitoring and early warning system |
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| CN111495703A (en) * | 2020-04-29 | 2020-08-07 | 京东方科技集团股份有限公司 | Detection method and detection device for display panel |
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